There is something quietly disorienting about standing in the middle of a high desert and realizing the ground beneath your ...

Just north of Flagstaff, Red Mountain offers hikers a rare opportunity to explore the inside of an ancient volcanic cinder ...

Explore California’s most underrated national park, where steaming fumaroles, bubbling mud pots, lava fields, and an active ...

Most volcanoes, loud and pushing, build their cinder cones openly of fiery ash and lava. But a few volcanoes work under cover. Their molten lava never reaches the surface, but quietly pushes up the ...

El Cono in Peru’s Sierra del Divisor rises sharply above the Amazon rainforest and has fueled claims that it may be an artificial pyramid. The discussion compares those claims with the geological view ...